Datasheet Linear Technology LTC3443

Manufacturer	Linear Technology
Series	LTC3443

High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter

Datasheets

PDF, 233 Kb, Revision: A, File uploaded: Sep 21, 2017

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Prices

Packaging

	LTC3443EDE#PBF	LTC3443EDE#TRPBF
N	1	2
Package	4x3 DFN-12 Package Outline Drawing	4x3 DFN-12 Package Outline Drawing
Package Code	DE/UE	DE/UE
Package Index	05-08-1695	05-08-1695
Pin Count	12	12

Parametrics

Parameters / Models	LTC3443EDE#PBF	LTC3443EDE#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC755A	DC755A
Design Tools	LTspice Model	LTspice Model
Export Control	no	no
Features	Output Disconnect, Burst Mode, External Synchronization	Output Disconnect, Burst Mode, External Synchronization
Frequency, kHz	600	600
Frequency Sync Range	600kHz - 1.2MHz	600kHz - 1.2MHz
Integrated Inductor	no	no
Ishutdown, µA	0.1	0.1
Isupply, mA	0.028	0.028
Monolithic	yes	yes
Number of Outputs	1	1
Operating Temperature Range, °C	0 to 85	0 to 85
Output Current, A	1.2	1.2
Polyphase	no	no
Synchronous	yes	yes
Topology	Buck-Boost	Buck-Boost
Vin Max, V	5.5	5.5
Vin Min, V	2.4	2.4
Vout Max, V	5.25	5.25
Vout Min, V	2.4	2.4

Eco Plan

	LTC3443EDE#PBF	LTC3443EDE#TRPBF
RoHS	Compliant	Compliant

Design Notes

Download
Simple Battery Circuit Extends Power over Ethernet (PoE) Peak Current &mdash DN361
PDF, 82 Kb, File published: Feb 17, 2005
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Simple Battery Circuit Extends Power over Ethernet (POE)
Peak Current вЂ“ Design Note 361
Mark Gurries
Introduction
Power over Ethernet (PoE) is a new development that allows for the delivery of power to Ethernet-based devices
via standard Ethernet CAT5 cable, precluding the need
for wall adapters or other external power sources. The
PoE speciп¬Ѓcation deп¬Ѓnes a hardware detection protocol
where Power Sourcing Equipment (PSE) is able to identify
PoE Powered Devices (PDs), thus allowing full backwards
compatibility with non-PoE-aware (legacy) Ethernet devices. The PoE speciп¬Ѓcation also sets an upper limit
on the power that can be drawn by a PD. The problem
is: what happens when a PD must draw more power
than allowed by the PoE standard? Examples may be
the spin up of a disk drive or a period of sustained
transmission of data from an RF transmitter. If the
average power load of these applications is less than
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks
and PowerPath is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. L1
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Articles

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Buck-Boost Converter Minimizes Output Voltage Transients from Very Low to High Output Current &mdash LT Journal
PDF, 144 Kb, File published: Mar 25, 2005
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DESIGN IDEAS Buck-Boost Converter Minimizes
Output Voltage Transients from
Very Low to High Output Current
Introduction
Most handheld devices incorporate
a low power mode (Burst Mode operation) to save precious battery life
during an extended period of inactivity.
Transitions from Burst Mode operation, however, can induce transient
perturbations in the output voltage,
which drain the battery unnecessarily.
The LTC3443 Buck-Boost converter
minimizes output voltage transient
perturbations, and thus realizes the
promise of Burst Mode operation to
significantly increase battery run
time.
The LTC3443 incorporates an adaptive clamp on the VC pinвЂ”active during
Burst Mode operationвЂ”which holds
the error amp integrator capacitor
to a п¬Ѓxed voltage determined by the
input and output voltage. The clamp
is removed when the LTC3443 is commanded out of Burst Mode operation.
In this way, the compensation capacitors are already close to the nominal …

Model Line

Series: LTC3443 (2)

LTC3443EDE#PBF LTC3443EDE#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Buck-Boost Regulators > Internal Power Switch Buck-Boost

EMS supplier

Slices

Microcontrollers